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(No Model.)

J. F. MGEL'ROY.

ROTARY ENGINE.

No. 510,482. Patented Dec. 12, 1898.

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WITNESSES INVENTORY 449 @4 6 i i/ W6 ATTQHNEK UNITED STATES PATENTOFFICE.

JAMES F. MOELROY, OF ALBANY, NEW YORK, ASSIGNOR TO THE CONSOLI- DATEDOAR-HEATING COMPANY, OF SAME PLACE.

Enema.

SPECIFICATION forming part of Letters Patent No. 510,482, dated December12, 1893. Application filed m 7. 1892. Serial macaw. (No modeld To allwhom it may concern.-

Be it known that I, JAMES F. MOELROY, a c tizen of the United States,residing in the city and county of Albany, State of New York, haveinvented a new and useful Improvement 1n Rotary Engines, of which thefollowing is a specification. I

My invention relates to motors of the turbine type; and the object of myinvention is to provlde a simple, inexpensive, efiicient and durablerotary engine. I attain this object by means of the mechanismillustrated in the accompanying drawings, in which.-

Figure 1 is an elevation. Fig. 2 is a cross section along the lines 1-1on Fig. 1. Fig. 3 1s a vertical section through lines 2'-2 on Fig. 2.Fig. 4 is a section along the lines 3-3 on Fig. 2, and Fig. 5 is asection along the lines 4t4 on Fig.

Similarletters refer to similar parts throughout the several views. IThe shaft A is suitably mounted in the casing or shell B and has keyedto it within the shell B, the cylinder 0. The shell B is provided withan interior chamber, the lateral nner walls of which fit closely aboutthe cylnder C, but leaving a space E above the cylinder for an exhaustchamber and a space below the cylinder into which the steam enters fromthe supply pipe D, the exhaust chamber E communicates with the dischargepipe F.

Into the cylinder 0, I construct two or more series of passages H, eachseries extending from one end of the cylinder to the other. I form thesepassages by coring out from the cylinder the passage way extending fromthe periphery into the cylinder on the line of a cord of a circle formedby a cross section of the cylinder 0. See Fig. 2. After passing a shortdistance into the cylinder, the passage way is curved in the directionof the axis of the cylinder and then extends back again to the surfacein a line parallel to the line of entry; said passage way being thus Ushaped and each side being at right angles to a right line passingthrough the center of the cylinder.

;, Into the interior wall of the shell B, I core out two or more lateralseries of U-shaped passages G, having their sides parallel to and beingof the same width as the corresponding passage way in the cylinder 0.Each series of passages G in the shell extends from the bottom to thetop of the cylinder 0, and the passages H in the cylinder coincide andregister with the passages G in the shell, as shown in Fig. 4. Thecylinder has several series of passages H, each series extending alongthe cylinder from top to bottom, while the shell is usually providedwith a smaller number of passages G, as is shown in Figs. 2 and 5. Asthus arranged, the steam entering the shell from the pipe D passesimmediately into the passage H in the cylinder, from thence it entersthe corresponding passage G in the shell passing from there into theadjacent passage H in the. cylinder and in this manner moves alternatelyfrom the cylinder to the shell in a continuous channel formed along thesurface of the cylinder parallel to its axis in which the curves in onedirection of the channel lie in the revolving cylinder and the curves inthe opposite direction lie in the stationary shell, untilit reaches theexhaust chamber where it is conducted to the open air. The passages Gand H I construct in such a manner as to allow for the expansion of thesteam, making the passage ways larger as they approach the exhaustchamber, in order that the full power and efficiency of thesteam may beattained.

The operation of my engine is apparent. The steam impinges against thecylinder at right angles to a radius thereof, which will tend to causethe cylinder to revolve. Immediately upon the registration of thepassage H in the cylinder with the passage G in the shell, the steamwithin the passage way II will force itself into the passage way G,where it will impinge and returning strike the cylinder in the manneralready described.

By my arrangement of the passage ways of the shell and cylinder, Iutilize the greatest amount of power that can be contributed by thesteam, because I force the steam against the cylinder each time at rightangles to a radius thereof and I cause the steam to strike the immovablepart, to wit: the shell, at a right angle and to return immediately tothe cylinder. In each instance there is no loss of power; on thecontrary, every particle of the force of the steam is made to assist inthe revolution of the cylinder.

Another advantage to be gained by my construction of the cylinder andthe passage ways within it, is that there is a positive 00- incidencewith the passage ways in the shell, the steam is not allowed to escapeor to waste, but is kept continually employed from the time it entersthe cylinder until it reaches the exhaust chamber, and when one of thepassage ways in the cylinder is registered with a passage wayin theshell, all of that series are in register and the steam within each ofthem is in operation at the same time and in the same manner, thusexerting the greatest amount of power at each of the points ofcoincidence throughout the whole extent of the cylinder.

My engine may be constructed very compactly and inexpensively, and itperforms the work required of it in a positive and satisfactory manner.

I do not limit myself to the location of the steam supply pipe, since itmay enter at the center rather than at the end of the shell, nor do Ilimit myself to the position of my engine, Vertically rather thanhorizontally.

I am aware that Letters Patent were issued May 31, 1892, to G. J.Altham, No. 475,957, showing two revolving cylinders operated by steampressure and joined by gearing to a disk secured to a shaft and I do notclaim that construction.

\Vhat Ido claim as myinvention, and desire to secure by Letters Patent,is

1. In a rotary engine, the combination with a stationary shell providedwith a steam inletchamber and a steam exhaust chamber, of a drivingshaft mounted to rotate in said shell,

a cylinder keyed to said shaft within said shell, two or more series ofdisconnected U shaped steam passage-ways cored out of said cyllnder eachseries extending from one end of said cylinder to the other, with steampassageways cored out of the interior wall of said shell correspondingin width and dlrection to the passage-ways in said cylinder,sub-

stan tiall y as described and for the purpose set forth.

2. In a rotary engine, the combination with a stationary shell providedwith a steam inlet chamber and a steam exhaust chamber, a driving shaftmounted to rotate in said shell, a cylinder secured on said shaft insaid shell and provided withtwo or more lateral series of U-shaped steampassage ways cored out from the periphery of said cylinder, the sides ofeach of said passage ways being at right angles to a radius of thecylinder passin g through the bottom of the U shaped passage way two ormore lateral series of U-shaped steam passage ways cored out of theinterior Wall of said shell, said passage ways in the shellcorresponding to and coinciding alternately with the passage ways in thecylinder, in such a manner that steam passes in a continuous channelformed along the surface of the cylinder parallel to its axissubstantially as described and for the purpose set forth.

3. In a rotary engine, the combination with a stationary shell, a steaminlet chamber, a steam exhaust chamber, a driving shaft mounted torotate in said shell, a cylinder securedon said shaft in said shell,said cylinder provided with steam passage ways cut into its periphery,said shell provided with steam passage ways out into its interior wall,arranged in such a manner that at certain positions of the cylindercontinuous channels are formed along the surface of the cylinderparallel to its axis, in which the curves in one direction of thechannel lie in the revolving cylinder and the curves in the oppositedirection lie in the stationary shell.

JAMES F. MCELROY. \Vitnesses:

EDWIN A. SMITH, WILLIAM P. EDDY.

